From the comments on this question, the SAM on the Apple II seemed to use some proprietary hardware to produce the waveform. (I am not counting the option to produce a horrendous 1-bit PWM using the ...

The SP0256-AL2 Speech IC was a popular solution for text to speech translation but is now out of production. There where several other chips that entered the market but as far as I know did not have ...

In the old days, it sometimes happened that a computer with a compatible but faster CPU, had problems running old games. For example, Sopwith was written for an 8088 PC; it was amusingly challenging ...